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Subsurface tile drainage from row-crop agricultural production systems has been identified as a major source of nitrate entering surface waters in the Mississippi River basin. Noncontrollable factors such as precipitation and mineralization of soil organic matter have a tremendous effect on drainage losses, nitrate concentrations, and nitrate loadings in… (More)
The nitrogen sufficiency index (NSI) can be used for in-season variable rate management of nitrogen (N) fertilizer to maintain productivity of potato (Solanum tuberosum, L.) while reducing leaching losses. The objective of this study was to evaluate the implications of using high spatial resolution broad-band imagery for determining N prescriptions at… (More)
Potato yield and quality are highly dependent on an adequate supply of water. In this study, 3 years of information from thermal and RGB images were collected to evaluate water status in potato fields. Irrigation experiments were conducted in commercial potato fields (Desiree; drippers). Two water-deficit scenarios were tested: a short-term water deficit… (More)
Unless otherwise indicated all of the team members are associated with the University of Minnesota, College of Agricultural, Food, and Environmental Sciences. Please note that this document has been reformatted and the electronic version may visually appear different than the original printed version. All the content has remained the same, except that the… (More)
Multiple watersheds AGNPS/GLEAMS – Pete Cooper as part of the Minnesota River Assessment Project in 1993. 10 subwatersheds were modeled. Evaluation of optical remote sensing models for crop residue cover assessment. Evaluation of predicted long-term water quality trends to changes in N fertilizer management for a cold climate.